mullek



(No Model.)

G. F, MLLER. WINDOW YBNTILATOR. NO'.' 281848.. M 4 Patented-NOV. 6, M838.farsi 9%@ @$5 MMM@ Nitin SPECIFICATION forming partof LettersPatent'il'o. 287,848, dated November 6, 1883.

' Application tiled March 26; I1HE3. (No model.) Patented in GermanyDecember 24,'18B1,l\'o.18,351.

To-all whom, it may concern.:l

Beitv known that I, GnnisriNE FRAizIsKA iiLLnmlasubject off the King ofPrussia, re-

Vsidingyat" Cologne, in the German Empire,

ranged in the upper part. Fig. 2 shows the ventilator A in Fig. 1, on anenlarged scale, in front yiew, Fig. 3 vis a vertical scot-ion,

and Fig. 4 a horizontal section, of the same.

Fig. 5- vrepresents front view, vertical and horizontal sections of aventilatorwith modi fications. Fig. 6 is a front View and horizontalsectionof aventilator made of metal, such as cast-iron. Fig. 7 is avertical section of a ventilator inserted in a wall, with arrange- -meutfor closing the same. Fig. 8 isa vertical section, shotving mpdications.Fig. 9 repre sents front view, vertical and horizontal sections of aventilator madeof 4clay orits equivaient. Fig. l() is ahorizontalsection of ventilator B, shown in Fig'l at line z' x. Fig.' 1l is avertical section ofthe ventilator B, shown in Fig. l at line z z. i

Similar letters represent similar parts in all the iigures. f Fig. lrepresents a window, in the upper part of which the ventilators A or Bare inserted. The ventilator A (shown on ail-enf open for the freeadmittance of the air.

larged scale in Fig.l2)consists cfa glass pane, m, having prismatic orconical lndeutations or cavities e, arranged so as to come toward theinside of the room, the upper plane, a b,'b,eing These cavities may bemade in section, as shown in pieces of glass, open atv theupper plane,to al'-l low the air to enter. y

i The ventilator represented in Fig. 5 has two conical or prismaticindentations or cavities, c e, placed aboveeach other and reversed, theone toward the inside and the other toward the outside; and open attheir line of' connection a b. V

The ventilator represented in Fig. 6 is made of cast-iron or any othersuitable metal,` and attached to a frame orbox, G, to be placed inL asuitable opening made in the Wall `of the building. The indentation's orrecesses e may 65 be arranged either to open into the building, as shownin Fig. 7, or to project toward the outside, as shown in Fig. 8. In theformer arrangement the air will pass into the building, and by thelatter arrangement the current will pass outward, as shown -by theVarrows. The end of this box G is closed by a suitable reg-v ister, D,upon which a corresponding disk, E, is placed, so as to open or closethe openings F, as may be desired. p f

- Fig. :Sli-epresents the construction of a ventilator when made of clayor similar material, to be inserted in the wall of the building.

W'hat 'l claim as my invention, and desire to secure by Letters Pate-nt,isu l. The hereiirdescribed ventilator, consisting of the plate on., ofglass or other suitable material, with conical prismatic recessesor'iu.-

dentations e, open at their largest plane a b, adapted to be arranged ina window or Wall of the building, in the manner and forthe pur-- pose set forth. i l 1 2. A ventilator consisting of a metal frame; h, formingdiamond spaces, in combination with a straight flat piece of glass, v,in the upper and a conical prismatic recessed piece,.- w, in the lowerpart ol' each of said diamondshaped spaces, open at its largest planeab,

substantially asand for the purpose described. 3. As a new article ofmanufacture, a win-A g55 dow-glass consisting of a plane surface,"m,with conical prismatic recesses or indentaq tions c, open at theirlargest planeal b, subf stantially as and for the purpose herein dei,scribed. l i

CHRISTINE FRANZISKA MLLER.

'Vlfitnessesz ADoLrrr MLLER, CARL Dlnfrz.

